disable backtrack to prev sequence start code

[vuplus_dvbapp] / lib / dvb / tstools.cpp

diff --git a/lib/dvb/tstools.cpp b/lib/dvb/tstools.cpp
index d5ad249..438f6d6 100644 (file)
--- a/lib/dvb/tstools.cpp
+++ b/lib/dvb/tstools.cpp
@@ -698,9 +698,26 @@ int eDVBTSTools::findFrame(off_t &_offset, size_t &len, int &direction, int fram
                else if (direction == +1)
                        direction = 0;
        }
-                       /* let's find the next frame after the given offset */
        off_t start = offset;
 
+#if 0
+                       /* backtrack to find the previous sequence start, in case of MPEG2 */
+       if ((data & 0xFF) == 0x00) {
+               do {
+                       --start;
+                       if (m_streaminfo.getStructureEntry(start, data, 0))
+                       {
+                               eDebug("get previous failed");
+                               return -1;
+                       }
+               } while (((data & 0xFF) != 9) && ((data & 0xFF) != 0x00) && ((data & 0xFF) != 0xB3)); /* sequence start or previous frame */
+               if ((data & 0xFF) != 0xB3)
+                       start = offset;  /* Failed to find corresponding sequence start, so never mind */
+       }
+
+#endif
+
+                       /* let's find the next frame after the given offset */
        do {
                if (m_streaminfo.getStructureEntry(offset, data, 1))
                {
@@ -715,9 +732,11 @@ int eDVBTSTools::findFrame(off_t &_offset, size_t &len, int &direction, int fram
 //             eDebug("%08llx@%llx (next)", data, offset);
        } while (((data & 0xFF) != 9) && ((data & 0xFF) != 0x00)); /* next frame */
 
+#if 0
                        /* align to TS pkt start */
-//     start = start - (start % 188);
-//     offset = offset - (offset % 188);
+       start = start - (start % 188);
+       offset = offset - (offset % 188);
+#endif
 
        len = offset - start;
        _offset = start;